From the Abyss - Primeval Light

When Sora woke up, he didn't remember anything. I only remember a gentle female voice saying: "No matter how far apart we are, you are our pride." There was also a dragon that suddenly stopped in mid-air the moment he blurted out an unfamiliar name. ——The name is "Ying". He soon discovered that there was a power inside him that the world called "the abyss". The Seven Kingdoms saw him as a threat, but they had to ask him for help after he saved them time and time again. So he sat on the throne of the abyss and became the "King of the Void" that everyone feared. He took the creatures abandoned by heaven and knocked on the door of the Seven Kingdoms: "I need your help. Against the will of heaven." Some refused, some hesitated, and some set traps waiting for him to step into. Only Kong himself knows - he went on this road just because he wanted to find the person named "Ying". That's his sister. He woke up five hundred years earlier than him, and his current whereabouts are unknown. And the fate of the entire world hangs on his way to find her.